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McLauchlan et al. offer little evidence for their assumed connection between nitrogen availability and isotopic signature. Their assumption of its being unchanged today seems totally unfounded. Besides lightning nitrogen fixation used to be mainly biological, with a huge preference for the common light nitrogen. (more…)
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All issues of Pysikalische Blätter have been scanned and made freely available. While still in high school I used to read my father’s issues and I remember reading about climate warming there first, very probably Flohn 1981. The quality of the source made me accept the claim and probably was part of what led me to Nuclear Engineering later. (more…)
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For decades I have been unmoved by doomsayers, it’s when I read the optimists that I become afraid. Take food. The supply keeps growing faster than population and there’s still lots of room for more intensification – at more than one fossil calory for every calory on the plate and growing. (more…)
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I have grave doubts abouts Chimps’ ability to evaluate abstract tokens correctly, in fact I expect most humans to act differently when using symbolic tokens from what they’d do when actually distributing tangible goods. That said, if Proctor et al.’s result is good enough for Milinski, whom I’ve found always to be exemplary in his rigour, then it’s good enough for me. (more…)
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Castle et al. claim to have excluded confounding cohort effects. I’m not fully convinced. Only a few decades ago it was very rare to interact with anyone commercially you did not expect to deal with many times in the future too. Anonymous strangers were a rare occurrence, one’s grandnieces and grandnephews did not stay out of touch (more…)
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The exact equality between male and female results seems a dead giveaway that something must be fishy in Gregoricka & Sheridan’s result. Looking at the urban setting of Jerusalem I expect the agriculture in its surroundings to have been quite intensive with lots of manuring. No samples of grain were measured and it’s rather probable that they and the bread baked from them were elevated in heavy nitrogen (more…)
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The distribution of radiocarbon dates shows characteristic peaks and troughs stemming not from true temporally denser or looser clustering of finds but are artifacts of the calibration curve. Armit et al. offer a new method for trying to extract the signal from the data.
